[PATCH V3 0/6] Generalise ARM perf-events backend for oprofile

[Marc Titinger]

Hi, 

I'm just being curious : do these patches change the way those chips should be supported, that do not have a PMU-like IP, but implement PC-sampling thanks to a general purpose timer (not the system timer) ?

Thanks and Regards,
Marc. 


> From: matt at console-pimps.org
> To: robert.richter at amd.com
> Subject: [PATCH V3 0/6] Generalise ARM perf-events backend for oprofile
> Date: Mon, 13 Sep 2010 07:07:31 +0100
> CC: linux-arch at vger.kernel.org; linux at arm.linux.org.uk; linux-sh at vger.kernel.org; peterz at infradead.org; fweisbec at gmail.com; will.deacon at arm.com; acme at redhat.com; lethal at linux-sh.org; mingo at elte.hu; linux-arm-kernel at lists.infradead.org
> 
> The perf-events backend for OProfile that Will Deacon wrote in
> 8c1fc96f6fd1f361428ba805103af0d0eee65179 ("ARM: 6072/1: oprofile: use
> perf-events framework as backend") is of use to more architectures
> than just ARM. Move the code into drivers/oprofile/ so that SH can use
> it instead of the nearly identical copy of its OProfile code.
> 
> The benefit of the backend is that it becomes necessary to only
> maintain one copy of the PMU accessor functions for each architecture,
> with bug fixes and new features benefiting both OProfile and perf.
> 
> Note that I haven't been able to test these patches on an ARM board to
> see if I've caused any regressions. If anyone else could do that I'd
> appreciate it. Though, I have been able to compile this version of the
> series.
> 
> This patch series is based on,
> 
>     git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile.git core
> 
> These patches can also be found at,
> 
>     git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/sh-2.6.git perf-oprofile
> 
> Changes from v2:
>  - Rebased against Robert's oprofile core branch
>  - Moved even more of the ARM code into the generic oprofile code
>  - Broke the patches up into more logical steps
> 
> Changes from v1:
>  - Prefix the new functons with "oprofile_" instead of "op_".
>  - Fix ARM compilation errors
>  - Move all the oprofile-perf logic into oprofile_perf.c
>  - Include cleanup patch from Will
> 
> Matt Fleming (6):
>   perf: Add helper function to return number of counters
>   ARM: oprofile: Rename op_arm to oprofile_perf
>   ARM: oprofile: Move non-ARM code into separate init/exit functions
>   oprofile: Abstract the perf-events backend
>   ARM: Make oprofile depend on CONFIG_HW_PERF_EVENTS
>   sh: oprofile: Use perf-events oprofile backend
> 
>  arch/arm/Kconfig                 |    2 +-
>  arch/arm/kernel/perf_event.c     |    6 +
>  arch/arm/oprofile/Makefile       |    2 +-
>  arch/arm/oprofile/common.c       |  315 +------------------------------------
>  arch/sh/Kconfig                  |    2 +-
>  arch/sh/kernel/perf_event.c      |   17 ++
>  arch/sh/oprofile/Makefile        |    2 +-
>  arch/sh/oprofile/common.c        |  104 ++-----------
>  arch/sh/oprofile/op_impl.h       |   33 ----
>  drivers/oprofile/oprofile_perf.c |  322 ++++++++++++++++++++++++++++++++++++++
>  include/linux/oprofile.h         |    6 +
>  include/linux/perf_event.h       |    1 +
>  12 files changed, 368 insertions(+), 444 deletions(-)
>  delete mode 100644 arch/sh/oprofile/op_impl.h
>  create mode 100644 drivers/oprofile/oprofile_perf.c
> 
> 
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